package com.sky.controller.user;

import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Api(tags = "C端-菜品浏览接口")
@Slf4j
public class DishController {
    private final DishService dishService;
    private final RedisTemplate<Object, Object> redisTemplate;

    @Autowired
    public DishController(DishService dishService, RedisTemplate<Object, Object> redisTemplate) {
        this.dishService = dishService;
        this.redisTemplate = redisTemplate;
    }


    /**
     * c端根据分类id查询菜品
     *
     * @param categoryId 分类id
     * @return 菜品列表
     */
    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<DishVO>> list(Long categoryId) {
        log.info("用户端根据分类id查询菜品:{}", categoryId);
        //构造redis中的key，规则：key：dish_+分类id
        String key = "dish_" + categoryId;
        //查询redis中是否存在菜品数据
        List<DishVO> list = (List<DishVO>) redisTemplate.opsForValue().get(key);
        if (list != null && !list.isEmpty()) {
            //如果存在则直接返回
            return Result.success(list, MessageConstant.SELECT_OK);
        }
        //如果不存在，查询数据库，将查询到的数据存到redis中 key：dish_+分类id value 菜品列表序列化成redis字符串
        list = dishService.listWithFlavor(Dish.builder().categoryId(categoryId).status(StatusConstant.ENABLE).build());
        redisTemplate.opsForValue().set(key, list);
        return Result.success(list, MessageConstant.SELECT_OK);
    }
}
